INGREDIENTS
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One package dry chocolate chip cookie mix (1 pound 1 1/2 ounces), found in the baking aisle
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1 cup bittersweet chocolate chunks
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4 ounces walnut pieces (about 1 1/4 cups)
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7 tablespoons softened unsalted butter
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4 tablespoons coffee liqueur, such as Kahlua
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3 tablespoons instant espresso or instant coffee crystals
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1 tablespoon ground coffee beans
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1 large egg, beaten